Comment 1 for bug 301430

The /etc/hosts file in an installed system is generated by netcfg. The version of netcfg in Intrepid, 1.44ubuntu4, specifically does add an ipv6 localhost entry. Here are the entries it creates:

  ::1 localhost ip6-localhost ip6-loopback
  fe00::0 ip6-localnet
  ff00::0 ip6-mcastprefix
  ff02::1 ip6-allnodes
  ff02::2 ip6-allrouters
  ff02::3 ip6-allhosts

What was in your /etc/hosts, if not this?